[FEATURE] Support request annotations in `unsafe` mode

[dwisiswant0]

Summary

Request annotations should be supported (or at least handled, gracefully), else is generated requests may be malformed when unsafe is enabled.

Found while reproducing #6350 btw.

Steps to reproduce

Template:

# annotation-unsafe.yaml
id: annotation-unsafe

info:
  name: HTTP Annotation with Unsafe Mode
  author: dwisiswant0
  severity: info
  tags: test

http:
  - raw:
      - |
        @Host: honey.scanme.sh
        GET /foo HTTP/1.1
        Host: {{Hostname}}
    unsafe: true
    matchers:
      - type: word
        words:
          - "foo"

Usage:

$ ./bin/nuclei -u http://scanme.sh -t annotation-unsafe.yaml -debug-req

                     __     _
   ____  __  _______/ /__  (_)
  / __ \/ / / / ___/ / _ \/ /
 / / / / /_/ / /__/ /  __/ /
/_/ /_/\__,_/\___/_/\___/_/   v3.6.2

		projectdiscovery.io

[INF] Current nuclei version: v3.6.2 (unknown) - remove '-duc' flag to enable update checks
[INF] Current nuclei-templates version: v10.3.6 (unknown) - remove '-duc' flag to enable update checks
[WRN] Scan results upload to cloud is disabled.
[INF] New templates added in latest release: 176
[INF] Templates loaded for current scan: 1
[WRN] Loading 1 unsigned templates for scan. Use with caution.
[INF] Targets loaded for current scan: 1
[INF] [annotation-unsafe] Dumped HTTP request for http://scanme.sh/foo

@Host: honey.scanme.sh
GET /foo HTTP/1.1
Host: scanme.sh
[INF] Scan completed in 162.088777ms. No results found.