test(NODE-6358): perf test against current branch

[durran]

Description

Updates benchmarks to run against current branch.

What is changing?

• Sets LIBRARY in the environment to the current working directory.
• Updates dbx-js-tools to latest.
• Removes the Node version from the bench task names.

NOTE this PR will clear perf benchmark history.

Here's a run pointing at mongodb-js/dbx-js-tools#20

https://spruce.mongodb.com/task/node_bson_perf_run_granular_benchmarks_patch_426c781b3f944bb100a3e70268f3a17210a1178f_66d87ce9c5ee6b0007ef93c4_24_09_04_15_29_49/logs?execution=0

That PR merged, new PR here:

https://spruce.mongodb.com/task/node_bson_perf_run_granular_benchmarks_patch_886391587154866befadc8dd44110411ed54d1ff_66d8e533246d3100075d3bec_24_09_04_22_54_45/logs?execution=0

Is there new documentation needed for these changes?

None

What is the motivation for this change?

NODE-6358

Double check the following

• Ran npm run check:lint script
• Self-review completed using the steps outlined here
• PR title follows the correct format: type(NODE-xxxx)[!]: description
  • Example: feat(NODE-1234)!: rewriting everything in coffeescript
• Changes are covered by tests
• New TODOs have a related JIRA ticket

[nbbeeken]

LGTM once the other PR merges