urlencode key characters only

[tarunKoyalwar]

Proposed changes

• The Default url.values encoded any/all reserved characters which certain payloads ex: sqli , xss etc
  • Example template CVE-2022-0785
• urlutil.Params is used instead of url.values which only encodes key characters (similar to burp and xss tools adds url encoders utils#42 )
  • Only Certain char are encoded which are necessary/breaking ex: space,[] etc
  • Now it is possible to send raw payloads ex: ?xss="><script>alert(1)</script> without encoding <,' and other breaking payload logic

closes #2698

Checklist

• Pull request is created against the dev branch
• All checks passed (lint, unit/integration/regression tests etc.) with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[tarunKoyalwar]

Example

Before this PR

nuclei -u https://scanme.sh -id CVE-2022-0785  -v

                     __     _
   ____  __  _______/ /__  (_)
  / __ \/ / / / ___/ / _ \/ /
 / / / / /_/ / /__/ /  __/ /
/_/ /_/\__,_/\___/_/\___/_/   v2.8.5

		projectdiscovery.io

...
[INF] Using Nuclei Engine 2.8.5 (latest)
[INF] Using Nuclei Templates 9.3.3 (latest)
[INF] Templates added in last update: 238
[INF] Templates loaded for scan: 1
[INF] Targets loaded for scan: 1
[VER] [CVE-2022-0785] Sent HTTP request to https://scanme.sh/wp-admin/admin-ajax.php?action=get_monthly_timetable&month=1+AND+%28SELECT+6881+FROM+%28SELECT%28SLEEP%286%29%29%29iEAn%29
[INF] No results found. Better luck next time!
tarun@Taruns-MacBook-Pro:~/nuclei-templates » 

With this PR

 go run . -u https://scanme.sh -id CVE-2022-0785  -v                                                                    

                     __     _
   ____  __  _______/ /__  (_)
  / __ \/ / / / ___/ / _ \/ /
 / / / / /_/ / /__/ /  __/ /
/_/ /_/\__,_/\___/_/\___/_/   v2.8.5

		projectdiscovery.io

...
[INF] Using Nuclei Engine 2.8.5 (latest)
[INF] Using Nuclei Templates 9.3.3 (latest)
[INF] Templates added in last update: 238
[INF] Templates loaded for scan: 1
[INF] Targets loaded for scan: 1
[VER] [CVE-2022-0785] Sent HTTP request to https://scanme.sh/wp-admin/admin-ajax.php?action=get_monthly_timetable&month=1+AND+(SELECT+6881+FROM+(SELECT(SLEEP(6)))iEAn)
[INF] No results found. Better luck next time!