add link to captured spans to message body for "error rate high" alerts

[annamontare-nava]

JIRA Ticket:
n/a

What Does This PR Do?

For the "error rate high" alerts, add a link to the spans for the alert's timeframe. This will hopefully make debugging easier.

What Should Reviewers Watch For?

If you're reviewing this PR, please check for these things in particular:

• any more helpful links we'd like to add?

Validation

These changes have been validated by deploying to test. Will deploy to other environments after review.

What Security Implications Does This PR Have?

Please indicate if this PR does any of the following:

• Adds any new software dependencies
• Modifies any security controls
• Adds new transmission or storage of data
• Any other changes that could possibly affect security?

• Yes, one or more of the above security implications apply. This PR must not be merged without the ISSO or team
  security engineer's approval.

Any Migrations?

• Yes, there are migrations
  • The migrations should be run PRIOR to the code being deployed
  • The migrations should be run AFTER the code is deployed
  • There is a more complicated migration plan (downtime,
    etc)
• No migrations