UTBot multi-IDE support

[tamarinvs19]

Description

IDEs

Supported plugin building for PyCharm (Community/Professional) and GoLand.

By default plugin will be support languages according to ideType (parameter in gradle.properties):

ideType	UTBot language support	IDE
IC	Java, Python	IDEA Community
IU	Java, Python, JavaScript, Go	IDEA Ultimate
PC	Python	PyCharm Community
PY	Python, JavaScript	PyCharm Professional
GO	Go	GoLand

For example, if you set ideType=PC (in gradle.properties) to build utbot plugin for PyCharm Community.

Language to IDEs

Language	ideTypes
Java	IC, IU
Python	IC, IU, PC, PY
JavaScript	IU, PY
Go	IU, GO

Additional functionality: you can set projectType=Community to build plugin without Go and JavaScript for IDEA Ultimate.

NB: Plugin for IU works in IC (only for Java and Python), for IC works in IU; plugin for PY works in PC and for PC works in PY.

Settings

UTBot settings have been separated to "common" and -specific (now only java-specific). Java-specific settings have been moved to UnitTestBot sub-page.

In PyCharm or GoLand build Java settings will not be included.

Also Experimental language support settings now is enabled by default.

How to test

Manual tests

Build plugin ($ gradle buildPlugin) with different ideType and check that UTBot supports all suitable languages.

Self-check list

• I've set the proper labels for my PR (at least, for category and component).
• PR title and description are clear and intelligible.
• I've added enough comments to my code, particularly in hard-to-understand areas.
• The functionality I've repaired, changed or added is covered with automated tests.
• Manual tests have been provided optionally.
• The documentation for the functionality I've been working on is up-to-date.