Remove warnings on some builds

[SeleznevPavel]

We have a product where the warning Werror=return-type is enabled and is treated as an error for the entire build process. So our build process stops. Of course, we can do tricks in the build script, but I guess this commit will be useful because it removes one excluded warning.

[SeleznevPavel]

@microsoft-github-policy-service agree company="Sbertech"
@microsoft-github-policy-service agree

[SeleznevPavel]

@hanefi @thanodnl

This pull request stopped my work on the main product - I can't modify the Citus sources in the project I am working on currently. Do you think it's possible to merge this pull request into the main branch?

Also, I didn't know how the review process is organized in Citus project.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 49.04%. Comparing base (c52f360) to head (29f7d02).
Report is 2 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (c52f360) and HEAD (29f7d02). Click for more details.

HEAD has 151 uploads less than BASE

Flag	BASE (c52f360)	HEAD (29f7d02)
14_regress_check-pytest	2	0
_upgrade	30	1
15_regress_check-follower-cluster	2	0
14_regress_check-columnar-isolation	2	0
14_regress_check-follower-cluster	2	0
16_regress_check-pytest	2	0
15_regress_check-pytest	2	0
15_regress_check-query-generator	2	0
14_16_upgrade	2	0
15_regress_check-enterprise-isolation-logicalrep-3	2	0
16_regress_check-query-generator	2	0
16_regress_check-follower-cluster	2	0
15_regress_check-enterprise-isolation-logicalrep-2	2	0
15_regress_check-columnar-isolation	2	0
14_regress_check-enterprise-isolation-logicalrep-3	2	0
16_regress_check-columnar-isolation	2	0
16_regress_check-enterprise-isolation-logicalrep-3	2	0
15_regress_check-columnar	2	0
14_regress_check-split	2	0
14_regress_check-columnar	2	0
15_regress_check-split	2	0
14_regress_check-enterprise-failure	2	0
15_regress_check-multi-mx	2	0
15_regress_check-enterprise	2	0
15_regress_check-enterprise-isolation-logicalrep-1	2	0
14_regress_check-enterprise-isolation-logicalrep-1	2	0
16_regress_check-enterprise-isolation	2	0
16_regress_check-enterprise-isolation-logicalrep-1	2	0
14_regress_check-enterprise	2	0
16_cdc_installcheck	2	0
15_cdc_installcheck	2	0
14_regress_check-query-generator	2	0
16_regress_check-enterprise-failure	2	0
14_regress_check-enterprise-isolation-logicalrep-2	2	0
14_regress_check-operations	2	0
16_regress_check-failure	2	0
14_regress_check-multi-mx	2	0
16_regress_check-multi-mx	2	0
14_regress_check-failure	2	0
15_regress_check-failure	2	0
15_regress_check-enterprise-isolation	2	0
15_regress_check-vanilla	2	0
16_regress_check-enterprise-isolation-logicalrep-2	2	0
14_15_upgrade	2	0
16_regress_check-columnar	2	0
15_regress_check-isolation	2	0
16_regress_check-isolation	2	0
14_regress_check-isolation	2	0
14_regress_check-multi	2	0
15_regress_check-multi	2	0
16_regress_check-multi	2	0
15_regress_check-multi-1	1	0
14_regress_check-multi-1	1	0
16_regress_check-multi-1	2	0
15_regress_check-operations	2	0
16_regress_check-operations	2	0
16_regress_check-vanilla	2	0
15_16_upgrade	2	0
16_regress_check-enterprise	2	0
15_regress_check-enterprise-failure	2	0
14_regress_check-enterprise-isolation	2	0
14_regress_check-vanilla	2	0
16_regress_check-split	2	0

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #7680       +/-   ##
===========================================
- Coverage   89.69%   49.04%   -40.65%     
===========================================
  Files         283      282        -1     
  Lines       60510    59501     -1009     
  Branches     7541     7313      -228     
===========================================
- Hits        54276    29185    -25091     
- Misses       4079    27699    +23620     
- Partials     2155     2617      +462     

[SeleznevPavel]

@hanefi I have squashed commits to better readability