refactor: Rename gtest conflicting test macros

[hallfox]

bmqtst provides several gtest-like compatibility macros, but this prevents us from using gtest or gmock directly because it uses the exact same names as the test macros from that library. Since we want to support at least using gmock in our tests, we rename them to avoid conflict.

[pniedzielski]

@hallfox DCO check failure and formatting check failure. Could you do the clang formatting fixes in another commit, so I can still easily review the first commit?

[bmq-oss-ci]

Build 393 of commit feac33c has completed with FAILURE

[pniedzielski]

Looks good. I see three remaining ASSERTs outside of bmqst; they don't prevent building but here they are:

src/groups/bmq/bmqp/bmqp_puteventbuilder.t.cpp
2281:    ASSERT(rawEvent.isValid());
2282:    ASSERT(rawEvent.isPutEvent());
2288:    ASSERT(putIter.isValid());

[bmq-oss-ci]

Build 395 of commit 73e2eda has completed with FAILURE

[bmq-oss-ci]

Build 403 of commit e262c9f has completed with FAILURE

[pniedzielski]

👍🏻