feat(alerts): Add prediction support to NRQL alert conditions

[founddrama]

Description

• Adds support for prediction fields on NRQL alert conditions
• prediction field is only available for static NRQL conditions (not baseline/anomaly conditions)
• Current state of the feature: released internally and open to limited preview (public preview coming shortly)
• Depends on feat(alerts): Add support for prediction to NRQL alert conditions newrelic-client-go#1271

Type of change

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Checklist:

• My commit message follows conventional commits
• My code is formatted to Go standards
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes. Go here for instructions on running tests locally.

How to test this change?

For an account that is current added to the feature flag:

• Create a static NRQL alert condition that uses the prediction field
• Should also be able to update that condition
• Should not interfere with the CRUD operations of NRQL alert conditions that do NOT have the prediction field
• (FWIW: we've been testing this internally since December)

[pranav-new-relic]

A note for the reviewer: compile is failing on this PR, since it depends on changes in the New Relic Go Client PR referenced in the description.

[pranav-new-relic]

👀 👀

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 47.27273% with 29 lines in your changes missing coverage. Please review.

Project coverage is 31.06%. Comparing base (92361de) to head (60f31d5).
Report is 132 commits behind head on main.

Files with missing lines	Patch %	Lines
...wrelic/structures_newrelic_nrql_alert_condition.go	47.27%	25 Missing and 4 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2816      +/-   ##
==========================================
- Coverage   32.82%   31.06%   -1.76%     
==========================================
  Files          98      102       +4     
  Lines       26884    27602     +718     
==========================================
- Hits         8824     8574     -250     
- Misses      17902    18858     +956     
- Partials      158      170      +12     

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[pranav-new-relic]

Tested multiple cases of Baseline and Static NRQL Alert Conditions, with and without this attribute. All should be good. The test cases in the NRQL Alert Condition resource are also running fine.