test: refactor header inclusion to speed up building (for test/common/http)

[foreseeable]

Signed-off-by: Muge Chen mugechen@google.com

Commit Message: refactor header inclusion to speed up building
Additional Description: This is the follow up PR for dividing the monolithic mock header test/mocks/upstream/mocks.h #12048
We refactored mock class include directives, this will reduce the target size and building time.
Risk Level: low
Testing: existing tests
Docs Changes: N/A
Release Notes: no

[derekargueta]

Out of curiosity, do you have benchmark numbers of how much this speeds up the build?

[foreseeable]

Out of curiosity, do you have benchmark numbers of how much this speeds up the build?

@derekargueta
Here is the building time comparison for affected tests:

test_name	after	before
//test/common/http:async_client_impl_test	91.241s	113.855s
//test/common/http:codec_client_test	72.036s	71.402s
//test/common/http:conn_manager_impl_fuzz_test	81.805s	95.341s
//test/common/http:conn_manager_impl_test	106.559s	106.681s
//test/common/http/http1:conn_pool_test	70.243s	72.604s
//test/common/http/http2:conn_pool_test	73.546s	67.012s

For some test the building time does not change much, since upstream_mocks is not the bottleneck in compilation.

[derekargueta]

Super cool, thanks for sharing!

[asraa]

Thanks! LGTM besides one.

[asraa]

Thanks!

[rgs1]

@foreseeable was this done with a tool or manually?

[foreseeable]

it's done with a tool @rgs1 #12150