add http headers to spans

[NimrodAvni78]

Checklist

• If this enhances / fixes / changes a core feature, I have updated the features documentation

Allow for extracting HTTP headers into spans by set of rules, inspired structure by config-v2 structure

example:

ebpf:
  payload_extraction:
    http:
      generic:
        enabled: false
        policy:
          # exclude by default unless matched by an include or obfuscate rule.
          default_action: exclude
          # First matching rule decides outcome.
          match_order: first_match_wins
          # Obfuscate String to use on action: obfuscate
          obfuscation_string: "***"
        # Ordered include/exclude/obfuscate rules.
        rules:
          - action: obfuscate
            name: obfuscate-auth
            description: Obfuscate all autherization and token headers
            scope: request
            type: headers
            match:
              case_sensetive: false
              regex:
                - ".*auth.*"
                - ".*credential.*"
                - ".*cookie.*"
                - ".*token.*"
                - ".*api(\-?)key.*"
          - action: include
            name: include-coralogix-headers
            description: include all coralogix headers
            scope: both
            type: headers
            match:
              case_sensetive: false
              regex:
                - ".*cx.*"
                - ".*cgx.*"
                - ".*coralogix.*"