fix: Updated connection string for Firebolt (#17242)

* New branch from superset for integration with firebolt sqlalchemy adapter

* Added db_engine_spec file for Firebolt

* Removed firebolt code from superset repo

* Deleted virtual env commit

* Adding time grain changes to firebolt.py

* Updated README.md

Added steps to install and run Superset with Firebolt SQLAlchemy Adapter

* Update README.md

Reduced installation steps. Using PyPi installation for adapter now

* Revert "Update README.md"

This reverts commit 5ed17c7.

* Revert "Updated README.md"

This reverts commit 45c5072.

* added epoch methods, added test cases for firebolt db engine spec and edited setup.py

* Added license to files

* Added documentation for Firebolt-SQLAlchemy

* Removed trailing whitespace

* Updated connection string for Firebolt

Co-authored-by: apurva-sigmoid <89530372+apurva-sigmoid@users.noreply.github.com>
Co-authored-by: Apurva Anand <aapurva@sigmoidanalytics.com>

docs/src/pages/docs/Connecting to Databases/firebolt.mdx

@@ -14,11 +14,15 @@ Superset has been tested on `firebolt-sqlalchemy>=0.0.1`.
 The recommended connection string is:
 
 ```
-firebolt://{username}:{password}@{host}/{database}
+firebolt://{username}:{password}@{database}
+or
+firebolt://{username}:{password}@{database}/{engine_name}
 ```
 
 Here's a connection string example of Superset connecting to a Firebolt database:
 
 ```
-firebolt://email@domain:password@host/sample_database
+firebolt://email@domain:password@sample_database
+or
+firebolt://email@domain:password@sample_database/sample_engine
 ```

docs/src/pages/docs/Connecting to Databases/index.mdx

@@ -42,7 +42,7 @@ A list of some of the recommended packages.
 |[Elasticsearch](/docs/databases/elasticsearch)|```pip install elasticsearch-dbapi```|```elasticsearch+http://{user}:{password}@{host}:9200/```|
 |[Exasol](/docs/databases/exasol)|```pip install sqlalchemy-exasol```|```exa+pyodbc://{username}:{password}@{hostname}:{port}/my_schema?CONNECTIONLCALL=en_US.UTF-8&driver=EXAODBC```|
 |[Google Sheets](/docs/databases/google-sheets)|```pip install shillelagh[gsheetsapi]```|```gsheets://```|
-|[Firebolt](/docs/databases/firebolt)|```pip install firebolt-sqlalchemy```|```firebolt://{username}:{password}@{host}/{database}```|
+|[Firebolt](/docs/databases/firebolt)|```pip install firebolt-sqlalchemy```|```firebolt://{username}:{password}@{database} or firebolt://{username}:{password}@{database}/{engine_name}```|
 |[Hologres](/docs/databases/hologres)|```pip install psycopg2```|```postgresql+psycopg2://<UserName>:<DBPassword>@<Database Host>/<Database Name>```|
 |[IBM Db2](/docs/databases/ibm-db2)|```pip install ibm_db_sa```|```db2+ibm_db://```|
 |[IBM Netezza Performance Server](/docs/databases/netezza)|```pip install nzalchemy```|```netezza+nzpy://<UserName>:<DBPassword>@<Database Host>/<Database Name>```|