fix: Adjust GetFileType() function for new secret URI format

[ejlee3]

Closes #1504

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PR Checklist

Please check if your PR fulfills the following requirements:

• I am not introducing a breaking change (if you are, flag in conventional commit message with BREAKING CHANGE: describing the break)
• 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?)
• 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?)

Testing Instructions

1. Download compose file from edgex-compose
2. Modify the go.mod for device-virtual to add this replace replace github.com/edgexfoundry/device-sdk-go/v3 => github.com/ejlee3/device-sdk-go/v3 v3.0.0-20230907221428-f6709ffcbf22 to use the new device-sdk.
3. Build the docker image for device-virtual.
4. Change the image name for device virtual to docker.io/edgexfoundry/device-virtual:0.0.0-dev and add the following variables to the edgex-compose/docker-compose.yml under device-virtual > environment to make no default profile and device are created

DEVICE_PROFILESDIR: ./res
DEVICE_DEVICESDIR: ./res

3. Add http server service to the compose file and modify the volume mounts to the local system path. http-server.yml and all test files are attached
   httpd.zip

4. Deploy EdgeX by above compose file.

5. Create the following secret to device-virtual

POST https://localhost:8443/device-virtual/api/v3/secret
{
   "apiVersion":"v3",
   "secretName":"httpserver",
   "secretData":[
      {
        "key":"type",
        "value":"httpheader"
      },
      {
        "key":"headername",
        "value":"Authorization"
      },
      {
        "key":"headercontents",
        "value":"Basic ZWRnZXh1c2VyOmVkZ2V4cGFzc3dk"
      }
   ]
}

6. check in the edgex-ui to ensure that there are no profiles/devices for device-virtual. If there are, delete them in the UI (Be sure to stop device-virtual first).
7. Update variables Device > ProfilesDir and Device > DevicesDir with secure credentials URI from consul

ProfilesDir: http://httpd-auth:80/test_files/profile.json?edgexSecretName=httpserver
DevicesDir: http://httpd-auth:80/test_files/device.json?edgexSecretName=httpserver

8. Restart device-virtual
9. check in the edgex-ui to ensure that the profiles/devices get created

New Dependency Instructions (If applicable)

[codecov-commenter]

Codecov Report

Merging #1507 (f6709ff) into main (44a516e) will increase coverage by 0.03%.
The diff coverage is 100.00%.

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@@            Coverage Diff             @@
##             main    #1507      +/-   ##
==========================================
+ Coverage   46.56%   46.60%   +0.03%     
==========================================
  Files          30       30              
  Lines        2811     2813       +2     
==========================================
+ Hits         1309     1311       +2     
  Misses       1403     1403              
  Partials       99       99              

Files Changed	Coverage Δ
internal/provision/profiles.go	43.00% <ø> (ø)
internal/provision/common.go	73.91% <100.00%> (+2.48%)	⬆️

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[lenny-goodell]

LGTM