[improve][function-go]: upgrade prom client_golang to v1.15.1 to fix CVE-2022-21698

[ericsyh]

Fixes #xyz

Master Issue: #xyz

PIP: #xyz

Motivation

Prometheus client_golang v1.11.1 is impacted by the CVE-2022-21698

Modifications

Upgrade the Prometheus client_golang to v1.15.1

Verifying this change

• Make sure that the change passes the CI checks.

(Please pick either of the following options)

This change is a trivial rework / code cleanup without any test coverage.

(or)

This change is already covered by existing tests, such as (please describe tests).

(or)

This change added tests and can be verified as follows:

(example:)

• Added integration tests for end-to-end deployment with large payloads (10MB)
• Extended integration test for recovery after broker failure

Does this pull request potentially affect one of the following parts:

If the box was checked, please highlight the changes

• Dependencies (add or upgrade a dependency)
• The public API
• The schema
• The default values of configurations
• The threading model
• The binary protocol
• The REST endpoints
• The admin CLI options
• The metrics
• Anything that affects deployment

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

Matching PR in forked repository

PR in forked repository:

[freeznet]

lgtm, and we will need to bump https://github.com/apache/pulsar-client-go/blob/master/go.mod as well.

[tisonkun]

@ericsyh do we have a superseded PR or why do we close this one?

[ericsyh]

@tisonkun Yep, we have a superseded PR #20579. Sorry, I should link them.