feat: Added in: header parameters support. #251

Job	Run time
test-cli (ai21.yaml)	56s
test-cli (anthropic.yaml)	43s
test-cli (assemblyai.yaml)	53s
test-cli (cohere.yaml)	1m 11s
test-cli (huggingface.yaml)	48s
test-cli (ipinfo.yaml)	45s
test-cli (langsmith.yaml)	1m 42s
test-cli (leonardo.yaml)	1m 6s
test-cli (mystic.yaml)	1m 3s
test-cli (ollama.yaml)	49s
test-cli (openai.yaml)	1m 24s
test-cli (petstore.yaml)	46s
test-cli (replicate.yaml)	1m 1s
test-cli (special-cases.yaml)	47s
test-cli (together.yaml)	48s
test-cli (heygen.yaml)	56s
test-cli (instill.yaml)	1m 1s
Publish / Build, test and publish	2m 30s
Release	0s
	19m 9s

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