SSL for self signed on prem env error.

### Version Information

latest v2.45.1

### Environment

on-prem on openshift.

### What is the current behaviour?

When creating event and triggering it the response is as following:
\"Internal error: HandshakeFailed (Error_protocol \\\"certificate rejected: [InvalidSignature SignatreInvalid]\\\" CertificateUnknown)
"type": "client_error",
"version": "2"

When doing curl in the pod itself.
`curl --capath /etc/ssl/certs` or `curl --cafile ` it also works, also `openssl s_client :443 -CAfile `.

### What is the expected behaviour?

The event to work and trigger creating a PUT request to the webhook.

### How to reproduce the issue?

1. Create a webhook in an on-prem self signed env.
2. Create the event
3. Trigger it.

### Any possible solutions/workarounds you're aware of?

I have tried the following:
(all operations i have used a bundle of ca certs that works in all of our env.)
Mounting to /etc/ssl/certs
Mounting to /etc/ssl/certs/ca-certificates.crt
Using TLS allow list in UI
Using tls verify false in env
Using `HASURA_GRAPHQL_CERTIFICATE_AUTHORITY=/certs/mycrt.crt`

Reproduce the webhook event in the on-prem OpenShift environment and compare it with curl and openssl using the same CA bundle. Trace TLS certificate handling for webhook PUT requests; done means a self-signed certificate trusted by that bundle no longer yields InvalidSignature or CertificateUnknown and the event triggers.

Written by the indexing model from the issue text.