fix(protocol): remove unnused strict in QSA and add it to waitForSelector docs (#8140)

Strict doesn't make sense in querySelectorAll, but it was in the protocol.

And we had a strict option in ElementHandle.waitForSelector but it
was not surfaced in the docs/api.

docs/src/api/class-elementhandle.md

@@ -974,3 +974,5 @@ This method does not work across navigations, use [`method: Page.waitForSelector
 ### option: ElementHandle.waitForSelector.state = %%-wait-for-selector-state-%%
 
 ### option: ElementHandle.waitForSelector.timeout = %%-input-timeout-%%
+
+### option: ElementHandle.waitForSelector.strict = %%-input-strict-%%

src/protocol/channels.ts

@@ -1828,10 +1828,9 @@ export type FrameQuerySelectorResult = {
 };
 export type FrameQuerySelectorAllParams = {
   selector: string,
-  strict?: boolean,
 };
 export type FrameQuerySelectorAllOptions = {
-  strict?: boolean,
+
 };
 export type FrameQuerySelectorAllResult = {
   elements: ElementHandleChannel[],

src/protocol/protocol.yml

@@ -1486,7 +1486,6 @@ Frame:
     querySelectorAll:
       parameters:
         selector: string
-        strict: boolean?
       returns:
         elements:
           type: array

src/protocol/validator.ts

@@ -754,7 +754,6 @@ export function createScheme(tChannel: (name: string) => Validator): Scheme {
   });
   scheme.FrameQuerySelectorAllParams = tObject({
     selector: tString,
-    strict: tOptional(tBoolean),
   });
   scheme.FrameSelectOptionParams = tObject({
     selector: tString,

types/types.d.ts

@@ -12893,6 +12893,12 @@ interface ElementHandleWaitForSelectorOptions {
    */
   state?: "attached"|"detached"|"visible"|"hidden";
 
+  /**
+   * When true, the call requires selector to resolve to a single element. If given selector resolves to more then one
+   * element, the call throws an exception.
+   */
+  strict?: boolean;
+
   /**
    * Maximum time in milliseconds, defaults to 30 seconds, pass `0` to disable timeout. The default value can be changed by
    * using the