Is your feature request related to a problem? Please describe.

As a user, I'd like to set the ACME HTTP01 solver pod's resources limit/request via podTemplate stanza: https://cert-manager.io/docs/configuration/acme/http01/#podtemplate. But the container resources is not one of the currently supported fields: https://cert-manager.io/docs/reference/api-docs/#acme.cert-manager.io/v1.ACMEChallengeSolverHTTP01IngressPodTemplate

There are already relevant controller flags which can be set globally:

But:

• It can only be set globally to a common value, not allowed to configure at issuer/solver level.
• While the comments describe the flag-based configuration as "a now deprecated mechanism," the podTemplate does not provide equivalent support, which may confuse users (i.e. make http01 solver pod resource request/limits configurable, refs #892 #923 (comment))

Describe the solution you'd like

Follow #1097, to add resources field in HTTP01 solver podTemplate.

(Linked similar issues for reference: #2770, #3108, #3853)

Describe alternatives you've considered

Additional context

We should both support acme-http01-solver-* flags and podTemplate.spec.resources for backwards compatibility. As for the precedence , I would prefer that if an Issuer/ClusterIssuer specifies resource settings via podTemplate, those values should override the ones set/defaulted by the acme-http01-solver-* flags.

/kind feature