appsec: never start a new WAF Context when one is in context #3354

Job	Run time
Prepare Go modules cache	7s
Smoke Tests	0s
macos-latest (AppSec disabled)	3m 3s
macos-12 go1.23	1s
windows-latest (AppSec disabled)	4m 26s
macos-12 go1.22	1s
ubuntu-latest-16-cores (AppSec disabled)	1m 19s
macos-14 go1.23	3m 43s
macos-14 go1.22	4m 12s
linux/amd64 golang:1.23-bookworm	1m 28s
linux/arm64 golang:1.23-bookworm	3m 48s
linux/amd64 golang:1.23-bullseye	1m 26s
linux/arm64 golang:1.23-bullseye	3m 24s
linux/amd64 golang:1.23-alpine	2m 19s
linux/arm64 golang:1.23-alpine	3m 22s
linux/amd64 golang:1.22-bookworm	1m 21s
linux/arm64 golang:1.22-bookworm	3m 6s
linux/amd64 golang:1.22-bullseye	1m 29s
linux/arm64 golang:1.22-bullseye	3m 7s
linux/amd64 golang:1.22-alpine	1m 19s
linux/arm64 golang:1.22-alpine	3m 6s
	46m 7s

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