roachtest: fix bench roachtests failing with validation when using json

[sambhav-jain-16]

The roachtests starting failing with validation errors Error: error creating metrics exporter: file path must end with .json after this PR
was merged #133035 path
defined in GetWorkloadHistogramArgs was jumbled.

Also there was an error in
#135239.

This change intends to fix all the errors.

Epic: none

Release note: None

[cockroach-teamcity]

This change is 

[sambhav-jain-16]

Triggered a test run: https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyGceBazel/17810012?buildTab=overview&hideProblemsFromDependencies=false&hideTestsFromDependencies=false&expandBuildChangesSection=true to verify the changes are working fine.

The above step failed due to another error:
Triggered another one with the fix: https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyGceBazel/17810217?buildTab=overview&hideProblemsFromDependencies=false&hideTestsFromDependencies=false&expandBuildChangesSection=true&showLog=17810217_744_166&logView=linear

[srosenberg]

The roachtests starting failing with validation errors Error: error creating metrics exporter: file path must end with .json. The path defined in GetWorkloadHistogramArgs was jumbled. This change intends to fix that.

Can you update your commit message to reference the aforementioned PR.

[sambhav-jain-16]

The roachtests starting failing with validation errors Error: error creating metrics exporter: file path must end with .json. The path defined in GetWorkloadHistogramArgs was jumbled. This change intends to fix that.

Can you update your commit message to reference the aforementioned PR.

Done

[sambhav-jain-16]

There were more errors in a different PR that I merged in the scripts #135239 (The build succeeded when I tested in my branch, not sure what happened suddenly).
I have reverted that commit in this PR to unblock the nightlies.

Test run: https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyGceBazel/17810249?showLog=17810249_5654_274.5012.5448&hideProblemsFromDependencies=false&hideTestsFromDependencies=false&expandBuildChangesSection=true&logView=linear&expandBuildTestsSection=true

[sambhav-jain-16]

There were more errors in a different PR that I merged in the scripts #135239 (The build succeeded when I tested in my branch, not sure what happened suddenly). I have reverted that commit in this PR to unblock the nightlies.

Test run: https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyGceBazel/17810249?showLog=17810249_5654_274.5012.5448&hideProblemsFromDependencies=false&hideTestsFromDependencies=false&expandBuildChangesSection=true&logView=linear&expandBuildTestsSection=true

Test run passed.
There are 3 failures due to pre-emption. Merging this PR.

[sambhav-jain-16]

TFTR!

bors r=@srosenberg

[craig]

Build succeeded:

• local_roachtest
• local_roachtest_fips
• windows_build
• macos_amd64_build
• acceptance
• examples_orms
• lint
• linux_amd64_fips_build
• linux_amd64_build
• linux_arm64_build
• macos_arm64_build
• docker_image_amd64
• unit_tests
• check_generated_code