Add support for rendering file with form field in curl command

[ramramu3433]

------
with curl 
curl -s -k -H 'Accept: application/json;charset=utf-8' -H "Content-Type: multipart/form-data" -H "Authorization: bearer $TOKEN" ${OPSURL}/api/installation_settings -X POST -F "installation[file]=@installation_settings.json"  
{}%   
------
with om curl
./om -e om_env.yml curl -p "https://30.0.0.5/api/installation_settings"  -H "Content-Type: multipart/octet-stream"   -H "Content-Type: multipart/form-data" -d "installation[file]=@installation_settings.json" -x POST
Status: 200 OK
Cache-Control: private, no-store
Connection: keep-alive
Content-Length: 2
Content-Security-Policy: script-src 'self'; img-src 'self' data:; style-src 'self' 'unsafe-inline'; object-src 'none';
Content-Type: application/json; charset=utf-8
Date: Wed, 25 Jun 2025 14:24:24 GMT
Etag: W/"44136fa355b3678a1146ad16f7e8649e"
Expires: Fri, 01 Jan 1990 00:00:00 GMT
Pragma: no-cache
Referrer-Policy: strict-origin-when-cross-origin
Server: Ops Manager
Strict-Transport-Security: max-age=63072000; includeSubDomains
X-Content-Type-Options: nosniff
X-Deprecated: This endpoint is deprecated and will be removed in the next release of Tanzu Ops Manager
X-Frame-Options: SAMEORIGIN
X-Permitted-Cross-Domain-Policies: none
X-Request-Id: f52d193f-78cc-4bce-bdcd-c0ea91d057dc
X-Runtime: 0.528417
{}
rjanakiraman@G16F6F3M29 om % echo $?
0

[krsri]

LGTM