[TS/JS] Move TS tests to dedicated folder and deps upgrade (#7508)

* Move TS tests to dedicated folder and deps upgrade

* Attempt to fix generate_code

* Fix dir on CI

* Add js extension

* Fix missing extension

* Harmonize with test gen

* Unexplained code gen change

* Restore yarn.lock

* Naive attempt to fix bazel stuff

* Pin @bazel/typescript to 5.2.0

* Attempt to fix bazel

* More tweak

* Upgrade deps

* Tweak?

* Fix path

* Fix test package

Co-authored-by: Derek Bailey <derekbailey@google.com>

tests/ts/my-game/example/test.js

@@ -0,0 +1,55 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+export class Test {
+    constructor() {
+        this.bb = null;
+        this.bb_pos = 0;
+    }
+    __init(i, bb) {
+        this.bb_pos = i;
+        this.bb = bb;
+        return this;
+    }
+    a() {
+        return this.bb.readInt16(this.bb_pos);
+    }
+    mutate_a(value) {
+        this.bb.writeInt16(this.bb_pos + 0, value);
+        return true;
+    }
+    b() {
+        return this.bb.readInt8(this.bb_pos + 2);
+    }
+    mutate_b(value) {
+        this.bb.writeInt8(this.bb_pos + 2, value);
+        return true;
+    }
+    static getFullyQualifiedName() {
+        return 'MyGame_Example_Test';
+    }
+    static sizeOf() {
+        return 4;
+    }
+    static createTest(builder, a, b) {
+        builder.prep(2, 4);
+        builder.pad(1);
+        builder.writeInt8(b);
+        builder.writeInt16(a);
+        return builder.offset();
+    }
+    unpack() {
+        return new TestT(this.a(), this.b());
+    }
+    unpackTo(_o) {
+        _o.a = this.a();
+        _o.b = this.b();
+    }
+}
+export class TestT {
+    constructor(a = 0, b = 0) {
+        this.a = a;
+        this.b = b;
+    }
+    pack(builder) {
+        return Test.createTest(builder, this.a, this.b);
+    }
+}