Using go-rfc for location header

[rimashah25]

Using go-rfc package for location header instead of a string value.

---

Which Traffic Control components are affected by this PR?

• Traffic Ops

What is the best way to verify this PR?

Ensure all features work correctly.

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

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 #7748 (1212b75) into master (aabc8cf) will decrease coverage by 0.01%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master    #7748      +/-   ##
============================================
- Coverage     32.14%   32.13%   -0.01%     
  Complexity       98       98              
============================================
  Files           712      712              
  Lines         81252    81252              
  Branches        965      965              
============================================
- Hits          26115    26113       -2     
- Misses        52992    52994       +2     
  Partials       2145     2145              

Flag	Coverage Δ
golib_unit	53.70% <ø> (ø)
grove_unit	12.02% <ø> (ø)
t3c_unit	5.99% <ø> (ø)
traffic_monitor_unit	26.33% <ø> (ø)
traffic_ops_integration	69.38% <ø> (ø)
traffic_ops_unit	21.93% <0.00%> (ø)
traffic_portal_v2	74.36% <ø> (-0.04%)	⬇️
traffic_stats_unit	10.76% <ø> (ø)
unit_tests	29.44% <0.00%> (-0.01%)	⬇️
v3	57.79% <ø> (ø)
v4	79.18% <ø> (ø)
v5	78.49% <ø> (ø)

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

Files Changed	Coverage Δ
traffic_ops/traffic_ops_golang/asn/asns.go	14.60% <0.00%> (ø)
...c_ops/traffic_ops_golang/cachegroup/cachegroups.go	14.93% <0.00%> (ø)
traffic_ops/traffic_ops_golang/cdn/cdns.go	28.15% <0.00%> (ø)
...fic_ops_golang/deliveryservice/deliveryservices.go	17.67% <0.00%> (ø)
...fic_ops_golang/deliveryservice/request/requests.go	2.37% <0.00%> (ø)
...affic_ops/traffic_ops_golang/division/divisions.go	8.45% <0.00%> (ø)
...ic_ops_golang/invalidationjobs/invalidationjobs.go	0.00% <0.00%> (ø)
.../traffic_ops_golang/physlocation/phys_locations.go	10.02% <0.00%> (ø)
...ic_ops_golang/servercapability/servercapability.go	10.12% <0.00%> (ø)
...ic_ops_golang/servicecategory/servicecategories.go	10.21% <0.00%> (ø)
... and 2 more

... and 1 file with indirect coverage changes

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more