fix(login): http 2 memory leak's (#11830)

# Which Problems Are Solved
All http 2 based connect-es clients caused memory leaks in our testing
using the login v2 application as the host.

# How the Problems Are Solved
Switch to connect-rpc based http 1.1 transport for the login v2

# Additional Changes
Improved the otel interceptor implementation and tests.

# Additional Context
- connect-rpc is only enabled for v2 API's so we have to make sure to
not use any v1 apis in the login but this should be the case anyways.
- Discussion #10562

---------

Co-authored-by: Max Peintner <max@caos.ch>

.devcontainer/docker-compose.yaml

@@ -1,5 +1,4 @@
 services:
-
   devcontainer:
     image: mcr.microsoft.com/devcontainers/typescript-node:22-bookworm
     volumes:
@@ -15,7 +14,6 @@ services:
       DEVCONTAINER_DB_HOST: db
       DEVCONTAINER_API_HOST: api
       DEVCONTAINER_LOGIN_HOST: login
-      DEVCONTAINER_LOGIN_API_MOCK_HOST: login-api-mock
       DEVCONTAINER_DB_API_INTEGRATION_HOST: db-api-integration
       DEVCONTAINER_DB_FUNCTIONAL_UI_HOST: db-functional-ui
     ports:
@@ -31,58 +29,49 @@ services:
     volumes:
       - db-data-dev:/var/lib/postgresql
     healthcheck:
-      test: [ "CMD-SHELL", "pg_isready", "-U", "postgres" ]
+      test: ["CMD-SHELL", "pg_isready", "-U", "postgres"]
       interval: "10s"
       timeout: "30s"
       retries: 5
       start_period: "20s"
     ports:
-      - 5432:5432
+      - "5432:5432"
 
   db-api-integration:
-    image: 'postgres:18'
+    image: "postgres:18"
     env_file:
       - ./.env.db
     environment:
       PGPORT: 5433
     command: postgres -c shared_preload_libraries=pg_stat_statements -c pg_stat_statements.track=all -c shared_buffers=1GB -c work_mem=16MB -c effective_io_concurrency=100 -c wal_level=minimal -c archive_mode=off -c max_wal_senders=0
     healthcheck:
-      test: [ "CMD-SHELL", "pg_isready", "-U", "postgres" ]
-      interval: '10s'
-      timeout: '30s'
+      test: ["CMD-SHELL", "pg_isready", "-U", "postgres"]
+      interval: "10s"
+      timeout: "30s"
       retries: 5
-      start_period: '20s'
+      start_period: "20s"
     ports:
-      - 5433:5433
+      - "5433:5433"
 
   cache-api-integration:
-    image: 'redis:8'
+    image: "redis:8"
     ports:
-      - 6379:6379
+      - "6379:6379"
 
   db-functional-ui:
-    image: 'postgres:18'
+    image: "postgres:18"
     env_file:
       - ./.env.db
     environment:
       PGPORT: 5434
     healthcheck:
-      test: [ "CMD-SHELL", "pg_isready", "-U", "postgres" ]
-      interval: '10s'
-      timeout: '30s'
+      test: ["CMD-SHELL", "pg_isready", "-U", "postgres"]
+      interval: "10s"
+      timeout: "30s"
       retries: 5
-      start_period: '20s'
+      start_period: "20s"
     ports:
       - "5434:5434"
 
-  login-api-mock:
-    build:
-      context: ../apps/login/integration/api-mock
-      additional_contexts:
-        zitadel-protos: ../proto
-    ports:
-      - 22220:22220
-      - 22222:22222
-
 volumes:
   db-data-dev: