[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/referrable.js

@@ -0,0 +1,70 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+import * as flatbuffers from 'flatbuffers';
+export class Referrable {
+    constructor() {
+        this.bb = null;
+        this.bb_pos = 0;
+    }
+    __init(i, bb) {
+        this.bb_pos = i;
+        this.bb = bb;
+        return this;
+    }
+    static getRootAsReferrable(bb, obj) {
+        return (obj || new Referrable()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+    }
+    static getSizePrefixedRootAsReferrable(bb, obj) {
+        bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
+        return (obj || new Referrable()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+    }
+    id() {
+        const offset = this.bb.__offset(this.bb_pos, 4);
+        return offset ? this.bb.readUint64(this.bb_pos + offset) : BigInt('0');
+    }
+    mutate_id(value) {
+        const offset = this.bb.__offset(this.bb_pos, 4);
+        if (offset === 0) {
+            return false;
+        }
+        this.bb.writeUint64(this.bb_pos + offset, value);
+        return true;
+    }
+    static getFullyQualifiedName() {
+        return 'MyGame_Example_Referrable';
+    }
+    static startReferrable(builder) {
+        builder.startObject(1);
+    }
+    static addId(builder, id) {
+        builder.addFieldInt64(0, id, BigInt('0'));
+    }
+    static endReferrable(builder) {
+        const offset = builder.endObject();
+        return offset;
+    }
+    static createReferrable(builder, id) {
+        Referrable.startReferrable(builder);
+        Referrable.addId(builder, id);
+        return Referrable.endReferrable(builder);
+    }
+    serialize() {
+        return this.bb.bytes();
+    }
+    static deserialize(buffer) {
+        return Referrable.getRootAsReferrable(new flatbuffers.ByteBuffer(buffer));
+    }
+    unpack() {
+        return new ReferrableT(this.id());
+    }
+    unpackTo(_o) {
+        _o.id = this.id();
+    }
+}
+export class ReferrableT {
+    constructor(id = BigInt('0')) {
+        this.id = id;
+    }
+    pack(builder) {
+        return Referrable.createReferrable(builder, this.id);
+    }
+}