[Tune]Add integer loguniform support (#12994)

* Add integer quantization and loguniform support

* Fix hyperopt qloguniform not being np.log'd first

* Add tests, __init__

* Try to fix tests, better exceptions

* Tweak docstrings

* Type checks in SearchSpaceTest

* Update docs

* Lint, tests

* Update doc/source/tune/api_docs/search_space.rst

Co-authored-by: Kai Fricke <krfricke@users.noreply.github.com>

Co-authored-by: Kai Fricke <krfricke@users.noreply.github.com>

doc/source/tune/api_docs/search_space.rst

@@ -192,10 +192,18 @@ For a high-level overview, see this example:
         # Sample a integer uniformly between -9 (inclusive) and 15 (exclusive)
         "randint": tune.randint(-9, 15),
 
+        # Sample a integer uniformly between 1 (inclusive) and 10 (exclusive),
+        # while sampling in log space
+        "lograndint": tune.lograndint(1, 10),
+
         # Sample a random uniformly between -21 (inclusive) and 12 (inclusive (!))
         # rounding to increments of 3 (includes 12)
         "qrandint": tune.qrandint(-21, 12, 3),
 
+        # Sample a integer uniformly between 1 (inclusive) and 10 (inclusive (!)),
+        # while sampling in log space and rounding to increments of 2
+        "qlograndint": tune.qlograndint(1, 10, 2),
+
         # Sample an option uniformly from the specified choices
         "choice": tune.choice(["a", "b", "c"]),
 
@@ -266,4 +274,4 @@ Grid Search API
 References
 ----------
 
-See also :ref:`tune-basicvariant`.
+See also :ref:`tune-basicvariant`.