Fix actions redirect handling

[ijjk]

This ensures we properly strip conflicting headers from being forwarded when handling the redirect request/response in actions.

x-ref: slack thread

Fixes:

failed to get redirect response TypeError: fetch failed
    at Object.fetch (node:internal/deps/undici/undici:11413:11) {
  cause: RequestContentLengthMismatchError: Request body length does not match content-length header
      at write (node:internal/deps/undici/undici:9907:41)
      at _resume (node:internal/deps/undici/undici:9885:33)
      at resume (node:internal/deps/undici/undici:9787:7)
      at connect (node:internal/deps/undici/undici:9776:7) {
    code: 'UND_ERR_REQ_CONTENT_LENGTH_MISMATCH'
  }
}