Cassandra types tests

[Gor027]

Pre-review checklist

• [x] I have split my patch into logically separate commits.
• [x] All commit messages clearly explain what they change and why.
• [x] PR description sums up the changes and reasons why they should be introduced.
• [x] I have enabled appropriate tests in .github/workflows/build.yaml in gtest_filter.

This PR is dependent on #68.

Adds necessary implementation to pass all CassandraTypesTests excluding UDT tests as it requires an implementation to get cluster schema metadata, so it will be done in another PR. Tests are modified to properly iterate over collections to check their values and size. As CassandraTypesTests tests collections with all possible types, overall 208 tests are enabled. Only tests for Decimal and Varint types are disabled, as invoke_binder_maker_macro_with_type is not yet implemented for Decimal type and cass_value_get_bytes is not implemented for Varint. The latter should be implemented for all types, however, it requires the rust driver to return raw bytes of values instead of CqlValue.

[avelanarius]

Interestingly, BasicsTests.Integration_Cassandra_Timestamps failed in the latest run (https://github.com/scylladb/cpp-rust-driver/actions/runs/2890498078/attempts/1). It looks like it's a bit time-sensitive and might be flaky on slower machines (such as GitHub Actions workers).

@Gor027 Have you seen this before?

[Gor027]

Yes, I was aware of it. Maybe we can manually increase the acceptable difference in the test, to avoid failures because of slow machines?

[avelanarius]

The Integration_Cassandra_Timestamps will be fixed in a follow-up PR as agreed.