[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/union_vector/book-reader.ts

@@ -0,0 +1,63 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+import * as flatbuffers from 'flatbuffers';
+
+
+
+export class BookReader {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+  __init(i:number, bb:flatbuffers.ByteBuffer):BookReader {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+booksRead():number {
+  return this.bb!.readInt32(this.bb_pos);
+}
+
+mutate_books_read(value:number):boolean {
+  this.bb!.writeInt32(this.bb_pos + 0, value);
+  return true;
+}
+
+static getFullyQualifiedName():string {
+  return 'BookReader';
+}
+
+static sizeOf():number {
+  return 4;
+}
+
+static createBookReader(builder:flatbuffers.Builder, books_read: number):flatbuffers.Offset {
+  builder.prep(4, 4);
+  builder.writeInt32(books_read);
+  return builder.offset();
+}
+
+
+unpack(): BookReaderT {
+  return new BookReaderT(
+    this.booksRead()
+  );
+}
+
+
+unpackTo(_o: BookReaderT): void {
+  _o.booksRead = this.booksRead();
+}
+}
+
+export class BookReaderT {
+constructor(
+  public booksRead: number = 0
+){}
+
+
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  return BookReader.createBookReader(builder,
+    this.booksRead
+  );
+}
+}