[yugabyte#30490,yugabyte#30580,yugabyte#30565,yugabyte#30738] YSQL: Add BNL cost parity tests

Summary:
Add tests demonstrating the BNL join cost parity issues yugabyte#30490, yugabyte#30580, yugabyte#30565 and yugabyte#30738.

The test framework shows join methods ordered by their costs and execution time for each query that exposes one or more of those issues.  The discrepancies between costs and timing are expected to narrow as each issue is addressed.

Test Plan: ./yb_build.sh release --java-test 'org.yb.pgsql.TestPgRegressPlannerEstimates' -n 100

Reviewers: gkukreja, smishra

Reviewed By: gkukreja

Subscribers: yql

Differential Revision: https://phorge.dev.yugabyte.com/D54125

Author: mtakahar