Update migration guide removing things not related to application dev…

…eloper (#1003)

* Refs #22012: Updated Step 4 format

Signed-off-by: Juanjo Garcia <[email protected]>

* Refs #22012: Modified and expanded Step 1

Signed-off-by: Juanjo Garcia <[email protected]>

* Refs #22012: Updated Step 4

Signed-off-by: Juanjo Garcia <[email protected]>

* Refs #22012: Clarified the relocation of fixed_size_string.hpp

Signed-off-by: Juanjo Garcia <[email protected]>

* Refs #22012: Added TODO comments to start discussion

Signed-off-by: Juanjo Garcia <[email protected]>

* Refs #22012: Corrected the table in step 4

Signed-off-by: Juanjo Garcia <[email protected]>

* Refs #22012: Shortened Step 9 significantly

Signed-off-by: Juanjo Garcia <[email protected]>

* Refs #22012: corrected typo

Signed-off-by: Juanjo Garcia <[email protected]>

* Refs #22012: Removed redundant line in step 6

Signed-off-by: Juanjo Garcia <[email protected]>

* Refs #22012: Solved failing CI

Signed-off-by: Juanjo Garcia <[email protected]>

* Refs #22012: Solved failing CI

Signed-off-by: Juanjo Garcia <[email protected]>

* Update docs/notes/migration_guide.rst

Co-authored-by: Raul Sanchez-Mateos Lizano <[email protected]>
Signed-off-by: juanjo4936 <[email protected]>

---------

Signed-off-by: Juanjo Garcia <[email protected]>
Signed-off-by: juanjo4936 <[email protected]>
Co-authored-by: Raul Sanchez-Mateos Lizano <[email protected]>
(cherry picked from commit 7874384)

# Conflicts:
#	docs/notes/migration_guide.rst