chore: add CHAT_V2_ENDPOINT feature flag and update learning-assistant lib

Author: mraman-2U

.env

@@ -52,3 +52,4 @@ OPTIMIZELY_FULL_STACK_SDK_KEY=''
 SHOW_UNGRADED_ASSIGNMENT_PROGRESS=''
 # Fallback in local style files
 PARAGON_THEME_URLS={}
+FEATURE_ENABLE_CHAT_V2_ENDPOINT=''

.env.development

@@ -54,3 +54,4 @@ OPTIMIZELY_FULL_STACK_SDK_KEY=''
 SHOW_UNGRADED_ASSIGNMENT_PROGRESS=''
 # Fallback in local style files
 PARAGON_THEME_URLS={}
+FEATURE_ENABLE_CHAT_V2_ENDPOINT='false'

.env.test

@@ -50,3 +50,4 @@ USER_INFO_COOKIE_NAME='edx-user-info'
 PRIVACY_POLICY_URL='http://localhost:18000/privacy'
 SHOW_UNGRADED_ASSIGNMENT_PROGRESS=''
 ENTERPRISE_LEARNER_PORTAL_URL='http://localhost:Enterprise'
+FEATURE_ENABLE_CHAT_V2_ENDPOINT='false'

package-lock.json

@@ -37,7 +37,7 @@
     "@edx/browserslist-config": "1.5.0",
     "@edx/frontend-component-footer": "^14.6.0",
     "@edx/frontend-component-header": "^6.2.0",
-    "@edx/frontend-lib-learning-assistant": "^2.20.0",
+    "@edx/frontend-lib-learning-assistant": "^2.22.0",
     "@edx/frontend-lib-special-exams": "^4.0.0",
     "@edx/frontend-platform": "^8.3.1",
     "@edx/openedx-atlas": "^0.7.0",