feat: ability to disable RTSP server on startup via configuration

[marcpfuller]

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PR Checklist

Please check if your PR fulfills the following requirements:

• [x] I am not introducing a breaking change (if you are, flag in conventional commit message with BREAKING CHANGE: describing the break)
• [x] I am not introducing a new dependency (add notes below if you are)
• [ ] I have added unit tests for the new feature or bug fix (if not, why?)N/A
• [x] I have fully tested (add details below) this the new feature or bug fix (if not, why?)
• [ ] I have opened a PR for the related docs change (if not, why?) N/A

Testing Instructions

1. run make test
2. start up edgex using edgex-compose make run no-secty
3. build device-usb-camera make build
4. enable/ disable EnableRtspServer in canfiguration.yml
5. verify Rtsp server starts and does not start when enabled/disabled

New Dependency Instructions (If applicable)

[codecov-commenter]

Codecov Report

Merging #268 (e5325cd) into main (040a5a6) will decrease coverage by 0.12%. The diff coverage is 0.00%.

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@@           Coverage Diff            @@
##            main    #268      +/-   ##
========================================
- Coverage   4.21%   4.10%   -0.12%     
========================================
  Files          8       8              
  Lines       1067    1096      +29     
========================================
  Hits          45      45              
- Misses      1022    1051      +29     

Files Changed	Coverage Δ
internal/driver/driver.go	3.62% <0.00%> (-0.17%)	:arrow_down:

[vyshali-chitikeshi]

Validation looks good both in secure and non-secure mode deployments. Below are more details

1. When rtsp server disabled in configuration.yml file, streaming status, start streaming and stop
   streaming APIs gives error "Device resource rtsp server is not enabled" as expected.
2. When rtsp server is enabled in configuration file, streaming status, start and stop streaming gives no error and works as expected. Also noticed below msg in logs "Starting rtsp authentication server on localhost:8000", This msg does not show up in logs when rtsp is disabled.
   3. Verified some general api's like camera status, camera info and camera status etc in both cases i.e. rtsp server enabled/disabled and they work correctly
   4. Negative test: Provided invalid value (something other than true/false) for rtsp server in configuration.yml file , noticed that it gave below error in logs, boot strapping exits before discovering cameras. I think this is expected. level=ERROR ts=2023-08-10T19:15:40.54388004Z app=device-usb-camera source=init.go:77 msg="ProtocolDriver init failed: failed to parse EnableRtspServer config: strconv.ParseBool: parsing \"abcd\": invalid syntax"
   5. Validated test cases from 1 to 4 both in secure and non secure modes, and results are same.

[ajcasagrande]

PR name should be updated. this is a feat. Also the current functionality is that it is enabled, so something like this:

feat: ability to disable RTSP server on startup via configuration