[HTTP] Stress fix for docker compose

Backport of #119274 to release/10.0

/cc @ManickaP

## Customer Impact

- [ ] Customer reported
- [x] Found internally

Wind down docker compose between individual runs in HTTP stress.

## Regression

- [x] Yes
- [ ] No

Infra update.

## Testing

CI stress runs.

## Risk

Low. Test only change.

Author: ManickaP

eng/pipelines/libraries/stress/http.yml

@@ -164,6 +164,7 @@ extends:
             New-Item -Force $env:SERVER_DUMPS_SHARE -ItemType Directory
             $env:HTTPSTRESS_CLIENT_ARGS = "$env:HTTPSTRESS_CLIENT_ARGS -http 2.0"
             $env:HTTPSTRESS_SERVER_ARGS = "$env:HTTPSTRESS_SERVER_ARGS -http 2.0"
+            & $env:DOCKER_COMPOSE_CMD down
             & $env:DOCKER_COMPOSE_CMD up --abort-on-container-exit --no-color
           displayName: Run HttpStress - HTTP 2.0
           condition: and(eq(variables['buildRuntime.succeeded'], 'true'), eq(variables['buildStress.succeeded'], 'true'))
@@ -177,6 +178,7 @@ extends:
             New-Item -Force $env:SERVER_DUMPS_SHARE -ItemType Directory
             $env:HTTPSTRESS_CLIENT_ARGS = "$env:HTTPSTRESS_CLIENT_ARGS -http 1.1"
             $env:HTTPSTRESS_SERVER_ARGS = "$env:HTTPSTRESS_SERVER_ARGS -http 1.1"
+            & $env:DOCKER_COMPOSE_CMD down
             & $env:DOCKER_COMPOSE_CMD up --abort-on-container-exit --no-color
           displayName: Run HttpStress - HTTP 1.1
           condition: and(eq(variables['buildRuntime.succeeded'], 'true'), eq(variables['buildStress.succeeded'], 'true'))