First part of refactoring the ExtProc used by both the EPP and the BBR (kubernetes-sigs/gateway-api-inference-extension#2428)

* Moved base header helpers to pkg/common

Signed-off-by: Shmuel Kallner <kallner@il.ibm.com>

* BBR to use requestIdKey from pkg/common

Signed-off-by: Shmuel Kallner <kallner@il.ibm.com>

* Moved default flow ID to  pkg/metadata

Signed-off-by: Shmuel Kallner <kallner@il.ibm.com>

* Updates due to move of requestId header key

Signed-off-by: Shmuel Kallner <kallner@il.ibm.com>

* Fixed copyright text

Signed-off-by: Shmuel Kallner <kallner@il.ibm.com>

* Increased timeout, times out if Git is slow

Signed-off-by: Shmuel Kallner <kallner@il.ibm.com>

* Reverted change to ready timeout

Signed-off-by: Shmuel Kallner <kallner@il.ibm.com>

* Increased metrics curl timeout for slower systems

Signed-off-by: Shmuel Kallner <kallner@il.ibm.com>

* Updated new test with updated header key location

Signed-off-by: Shmuel Kallner <kallner@il.ibm.com>

* Moved envoy related code under new common/envoy package

Signed-off-by: Shmuel Kallner <kallner@il.ibm.com>

* Changes due to package refactoring

Signed-off-by: Shmuel Kallner <kallner@il.ibm.com>

* Changes due to package refactoring

Signed-off-by: Shmuel Kallner <kallner@il.ibm.com>

---------

Signed-off-by: Shmuel Kallner <kallner@il.ibm.com>

Author: shmuelk

test/e2e/epp/e2e_test.go

@@ -533,7 +533,7 @@ func findReadyPod() *corev1.Pod {
 // getMetricsScrapeCommand returns the command to scrape the /metrics endpoint.
 func getMetricsScrapeCommand(podIP, token string) []string {
 	return []string{
-		"curl", "-i", "--max-time", strconv.Itoa((int)(4 * curlTimeout.Seconds())),
+		"curl", "-i", "--max-time", strconv.Itoa((int)(6 * curlTimeout.Seconds())),
 		"-H", "Authorization: Bearer " + token, fmt.Sprintf("http://%s:%d/metrics", podIP, 9090),
 	}
 }