feat: bump hybrid 1.9.2 plus local httpbin demo service

[danistrebel]

Description

What's changed, or what was fixed?

• bumped Apigee hybrid to 1.9.2
• removed the need for internal LB for the automatically generated ingress gateway
• created an in-cluster httpbin deployment for the sample-proxy to reduce dependencies on external service

Housekeeping

(please check all that apply [x], do not edit the text)

• [x] I have run all the tests locally and they all pass.
• [x] I have followed the relevant style guide for my changes.

Full Repo Validation Required

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• [ ] PR requires full pipeline run (Run for changes only by default).

CC: @apigee-devrel-reviewers

[OmidTahouri]

/gcbrun

[apigee-devrel-bot]

Pipeline Report

Pipeline	Result	Elapsed Wall Time
tools/hybrid-quickstart	pass	1892s
TOTAL PIPELINE	pass	1892s

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Commit version: 629e7fd