fix(secret): support aws secret name contains a slash /

[HuanXin-Chen]

Description

Currently, AWS Secrets Manager supports secret names that contain "/".

Fixes #11647

Checklist

• I have explained the need for this PR and the problem it solves
• I have explained the changes or the new features added to this PR
• I have added tests corresponding to this change
• I have updated the documentation to reflect this change
• I have verified that this change is backward compatible (If not, please discuss on the APISIX mailing list first)

[HuanXin-Chen]

@kayx23 It has been fixed; check if it meets your expectations.

[HuanXin-Chen]

My Thoughts:

AWS differs from others like Vault in that it can not only store JSON text but also String types.

Therefore, for instance, when referencing: APISIX/JSON/JACK

• If it's a JSON type, then the main_key would be APISIX/JSON, and the sub_key would be JACK.
• If it's a String type, both the main_key and the key should be APISIX/JSON/JACK.

You cannot differentiate solely based on APISIX/JSON/JACK, so you need to try both scenarios.

• When main_key == key, it is definitely a String type.
• When main_key != key, it could be either JSON or String.

If the JSON does not meet the requirements, then it's a String type.

Other Issues:

I noticed some errors in CI, but upon initial inspection, they do not seem to be related to my code.