fix(http-client): Set higher default timeout of 120s for http(s) agents

[davidkna-sap]

…eouts

The global HTTP(S) Agent has a 5s timeout (source).
This is likely the cause of https://github.com/SAP/ai-sdk-js-backlog/issues/603.

Closes SAP/cloud-sdk-backlog#ISSUENUMBER.

[davidkna-sap]

Ok, this does not solve the issue as-is, so I think the fix might belong in @sap-ai-sdk.

Nevertheless defaulting to OS-timeouts (presumably the case here) could still be sensible.

[davidkna-sap]

Axios (should) set req.setTimeout(0) in our case anyway.

[davidkna-sap]

Additional information:

• The default agents has timeout of 5s + keepAlive
• If keepAlive is false and timeout is undefined, no timeout happens
• If keepAlive is true and timeout is undefined, timeouts happen at ~5s
• If keepAlive is true and timeout is set, the provided timeout value is used. Infinity is possible, but in conjunction with keeping around a pool of sockets I imagine this could lead to socket exhaustion. Thus the alternative approach in feat: Disable keepAlive by default for HTTP(S) agents and add agentOp… #6725 disables keepAlive instead.

[KavithaSiva]

I prefer the solution at #6725 with some changes that I have requested for.
Setting a default of 2 mins for pooled socket timeout feels unecessary.

[KavithaSiva]

[q] Any reason why you picked 2 mins specifically?