Fixes alert message for POST and PUT invalidationjobs API

[rimashah25]

Closes: #6340

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Which Traffic Control components are affected by this PR?

• Traffic Ops

What is the best way to verify this PR?

Create an invalidation job (REFETCH) without refetch_enabled parameter and check the new message.
Create an invalidation job (REFRESH) without refetch_enabled parameter or refetch_enabled parameter value set to false and then using PUT API try and change the job from REFRESH to REFETCH.

If this is a bugfix, which Traffic Control versions contained the bug?

7.0.1

PR submission checklist

• This PR has tests
• This PR has documentation
• This PR has a CHANGELOG.md entry
• This PR DOES NOT FIX A SERIOUS SECURITY VULNERABILITY (see the Apache Software Foundation's security guidelines for details)

[codecov]

Codecov Report

Merging #7517 (4e6eeef) into master (1cad456) will decrease coverage by 34.85%.
The diff coverage is 0.00%.

@@              Coverage Diff              @@
##             master    #7517       +/-   ##
=============================================
- Coverage     65.10%   30.26%   -34.85%     
  Complexity       98       98               
=============================================
  Files           309      789      +480     
  Lines         11934    82551    +70617     
  Branches        840      840               
=============================================
+ Hits           7770    24980    +17210     
- Misses         3816    55467    +51651     
- Partials        348     2104     +1756     

Flag	Coverage Δ
golib_unit	48.57% <ø> (?)
grove_unit	4.60% <ø> (?)
t3c_unit	5.32% <ø> (?)
traffic_monitor_unit	21.28% <ø> (?)
traffic_ops_integration	69.42% <ø> (ø)
traffic_ops_unit	23.37% <0.00%> (?)
traffic_portal_v2	74.74% <ø> (-0.03%)	⬇️
traffic_stats_unit	10.14% <ø> (?)
unit_tests	27.33% <0.00%> (-47.43%)	⬇️
v3	57.79% <ø> (ø)
v4	79.18% <ø> (ø)
v5	78.63% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...ic_ops_golang/invalidationjobs/invalidationjobs.go	0.00% <0.00%> (ø)

... and 481 files with indirect coverage changes

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[ocket8888]

I've restarted the t3c tests and they just failed again. They're passing consistently on master, so I'm not sure why but I think it's a real error?

[ocket8888]

I've confirmed that this fixes the error messages. I have no idea how changing an error message is causing Traffic Portal and T3C integration tests to fail, and I can't get them to work well enough to troubleshoot outside of actions, so I'm going to just ignore the problem and hope it goes away. If not, then hopefully it'll at least annoy someone who can fix it.