chore: add merge_group as a trigger for status checks (#10510)

## Checklist
- [x] PR author has checked that all the criteria below are met
- The PR description includes an overview of the change
- The PR description articulates the motivation for the change
- The change includes tests OR the PR description describes a testing
strategy
- The PR description notes risks associated with the change, if any
- Newly-added code is easy to change
- The change follows the [library release note
guidelines](https://ddtrace.readthedocs.io/en/stable/releasenotes.html)
- The change includes or references documentation updates if necessary
- Backport labels are set (if
[applicable](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting))

## Reviewer Checklist
- [x] Reviewer has checked that all the criteria below are met 
- Title is accurate
- All changes are related to the pull request's stated goal
- Avoids breaking
[API](https://ddtrace.readthedocs.io/en/stable/versioning.html#interfaces)
changes
- Testing strategy adequately addresses listed risks
- Newly-added code is easy to change
- Release note makes sense to a user of the library
- If necessary, author has acknowledged and discussed the performance
implications of this PR as reported in the benchmarks PR comment
- Backport labels are set in a manner that is consistent with the
[release branch maintenance
policy](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting)

.github/workflows/build_deploy.yml

@@ -11,6 +11,9 @@ on:
       - build_deploy*
       - 'upgrade-latest-*'
   pull_request:
+  merge_group:
+    # Trigger jobs when PR is added to merge queue
+    types: [checks_requested]
   release:
     types:
       - published

.github/workflows/build_python_3.yml

@@ -1,6 +1,9 @@
 name: Build Python 3
 
 on:
+  merge_group:
+    # Trigger jobs when PR is added to merge queue
+    types: [checks_requested]
   workflow_call:
     inputs:
       cibw_build:

.github/workflows/codeql-analysis.yml

@@ -8,6 +8,9 @@ on:
     # The branches below must be a subset of the branches above
     branches:
       - main
+  merge_group:
+    # Trigger jobs when PR is added to merge queue
+    types: [checks_requested]
 
 jobs:
   analyze:

.github/workflows/django-overhead-profile.yml

@@ -8,6 +8,9 @@ on:
       - 'ddtrace/**'
       - 'scripts/profiles/django-simple/**'
       - '.github/workflows/django-overhead-profile.yml'
+  merge_group:
+    # Trigger jobs when PR is added to merge queue
+    types: [checks_requested]
 jobs:
   django-overhead-profile:
     runs-on: ubuntu-latest

.github/workflows/encoders-profile.yml

@@ -8,6 +8,9 @@ on:
       - 'ddtrace/internal/_encoding.pyx'
       - 'scripts/profiles/encoders/**'
       - '.github/workflows/encoders-profile.yml'
+  merge_group:
+    # Trigger jobs when PR is added to merge queue
+    types: [checks_requested]
 jobs:
   encoders-profile:
     runs-on: ubuntu-latest

.github/workflows/flask-overhead-profile.yml

@@ -8,6 +8,9 @@ on:
       - 'ddtrace/**'
       - 'scripts/profiles/flask-simple/**'
       - '.github/workflows/flask-overhead-profile.yml'
+  merge_group:
+    # Trigger jobs when PR is added to merge queue
+    types: [checks_requested]
 jobs:
   flask-overhead-profile:
     runs-on: ubuntu-latest

.github/workflows/pypa_musllinux_1_2_i686.yml

@@ -7,6 +7,9 @@ on:
       - 'main'
     paths:
       - 'docker/**'
+  merge_group:
+    # Trigger jobs when PR is added to merge queue
+    types: [checks_requested]
 
 jobs:
   build-and-publish:

.github/workflows/requirements-locks.yml

@@ -5,6 +5,9 @@ on:
       - main
   pull_request:
     types: [opened, reopened, synchronize]
+  merge_group:
+    # Trigger jobs when PR is added to merge queue
+    types: [checks_requested]
 jobs:
   validate:
     name: Check requirements lockfiles

.github/workflows/rust-ci.yml

@@ -4,6 +4,9 @@ on:
   pull_request:
     paths:
       - src/**
+  merge_group:
+    # Trigger jobs when PR is added to merge queue
+    types: [checks_requested]
 
 jobs:
   check:

.github/workflows/system-tests.yml

@@ -8,6 +8,9 @@ on:
   workflow_dispatch: {}
   schedule:
     - cron: '00 04 * * 2-6'
+  merge_group:
+    # Trigger jobs when PR is added to merge queue
+    types: [checks_requested]
 
 jobs:
   needs-run:

.github/workflows/test_frameworks.yml

@@ -5,6 +5,9 @@ on:
     branches:
       - main
   pull_request:
+  merge_group:
+    # Trigger jobs when PR is added to merge queue
+    types: [checks_requested]
 
 concurrency:
     group: ${{ github.workflow }}-${{ github.ref }}

.github/workflows/testrunner.yml

@@ -7,6 +7,9 @@ on:
       - 'main'
     paths:
       - 'docker/**'
+  merge_group:
+    # Trigger jobs when PR is added to merge queue
+    types: [checks_requested]
 
 jobs:
   build-and-publish:

.github/workflows/unit_tests.yml

@@ -6,6 +6,9 @@ on:
       - main
   pull_request:
   workflow_dispatch: {}
+  merge_group:
+    # Trigger jobs when PR is added to merge queue
+    types: [checks_requested]
 
 jobs:
   unit-tests: