…neration (#3723)

Part of the fix for
#3701 ☕

### Approach
The templates come from
https://github.com/googleapis/synthtool/tree/bf182cd41d9a7de56092cafcc7befe6b398332f6.
The only update was to include `generated-files-bot`, which is already
up to date in all the HW repos.

The `.kokoro` folder will be a separate follow up task. We will now
focus on solving the update of `update_generation_config` `yaml` and
`sh` files.

The fix to include the `.github` folder follows from
https://setuptools.pypa.io/en/latest/userguide/datafiles.html:
```
Glob patterns do not automatically match dotfiles, i.e., directory or file names starting with a dot (.).
To include such files, you must explicitly start the pattern with a dot, e.g. .* to match .gitignore.
```


Interestingly, this is also the reason `cp
synthool/gcp/templates/java_library/* ...` did not bring folders
starting with dot (such as .kokoro) into
#2884
### Confirming effects in downstream repos
Demos show the results as of
b66af92
in
 - googleapis/java-storage#3012
 - googleapis/java-logging#1787
 - googleapis/java-pubsub#2384
 - googleapis/java-bigtable#2546
 - googleapis/java-spanner#3711
 - googleapis/java-firestore#2065
 - googleapis/java-datastore#1810
 - googleapis/java-bigquerystorage#2929
 - googleapis/java-pubsublite#1837

There were no regressions on templated files that were manually
modified.

…neration (#3723)

Part of the fix for
#3701 ☕

### Approach
The templates come from
https://github.com/googleapis/synthtool/tree/bf182cd41d9a7de56092cafcc7befe6b398332f6.
The only update was to include `generated-files-bot`, which is already
up to date in all the HW repos.

The `.kokoro` folder will be a separate follow up task. We will now
focus on solving the update of `update_generation_config` `yaml` and
`sh` files.

The fix to include the `.github` folder follows from
https://setuptools.pypa.io/en/latest/userguide/datafiles.html:
```
Glob patterns do not automatically match dotfiles, i.e., directory or file names starting with a dot (.).
To include such files, you must explicitly start the pattern with a dot, e.g. .* to match .gitignore.
```


Interestingly, this is also the reason `cp
synthool/gcp/templates/java_library/* ...` did not bring folders
starting with dot (such as .kokoro) into
#2884
### Confirming effects in downstream repos
Demos show the results as of
b66af92
in
 - googleapis/java-storage#3012
 - googleapis/java-logging#1787
 - googleapis/java-pubsub#2384
 - googleapis/java-bigtable#2546
 - googleapis/java-spanner#3711
 - googleapis/java-firestore#2065
 - googleapis/java-datastore#1810
 - googleapis/java-bigquerystorage#2929
 - googleapis/java-pubsublite#1837

There were no regressions on templated files that were manually
modified.

…neration (#3723)

Part of the fix for
#3701 ☕

### Approach
The templates come from
https://github.com/googleapis/synthtool/tree/bf182cd41d9a7de56092cafcc7befe6b398332f6.
The only update was to include `generated-files-bot`, which is already
up to date in all the HW repos.

The `.kokoro` folder will be a separate follow up task. We will now
focus on solving the update of `update_generation_config` `yaml` and
`sh` files.

The fix to include the `.github` folder follows from
https://setuptools.pypa.io/en/latest/userguide/datafiles.html:
```
Glob patterns do not automatically match dotfiles, i.e., directory or file names starting with a dot (.).
To include such files, you must explicitly start the pattern with a dot, e.g. .* to match .gitignore.
```


Interestingly, this is also the reason `cp
synthool/gcp/templates/java_library/* ...` did not bring folders
starting with dot (such as .kokoro) into
#2884
### Confirming effects in downstream repos
Demos show the results as of
b66af92
in
 - googleapis/java-storage#3012
 - googleapis/java-logging#1787
 - googleapis/java-pubsub#2384
 - googleapis/java-bigtable#2546
 - googleapis/java-spanner#3711
 - googleapis/java-firestore#2065
 - googleapis/java-datastore#1810
 - googleapis/java-bigquerystorage#2929
 - googleapis/java-pubsublite#1837

There were no regressions on templated files that were manually
modified.