Improve handling of filter categories

[trz42]

Currently, the defined filter categories are architecture, instance, job and repository (see code snippet below). Because they do not share any common prefix, even using just a single letter a, i, j or r is sufficient to uniquely specify a category. If filters with shared prefixes were defined, e.g., repository and request (common prefixes r or re), at least three characters were needed to uniquely identify a category.

Code defining filter categories

eessi-bot-software-layer/tools/filter.py

Lines 20 to 24 in ef8613b

	FILTER_COMPONENT_ARCH = 'architecture'
	FILTER_COMPONENT_INST = 'instance'
	FILTER_COMPONENT_JOB = 'job'
	FILTER_COMPONENT_REPO = 'repository'
	FILTER_COMPONENTS = [FILTER_COMPONENT_ARCH, FILTER_COMPONENT_INST, FILTER_COMPONENT_JOB, FILTER_COMPONENT_REPO]

When working with filters it should be verified if a filter in a command matches a single or multiple of these categories. If it matches more than one category, a response providing guidance should be generated and the command should be ignored. For example, if a command

bot: build re:2023.06

is sent to the bot, a response such as below could be generated

Filter category 're' in command 'bot: build re:2023.06' is ambiguous (matches categories 'repository' and 'request') - so, ignoring it. Please, add more letters to the category to uniquely chose one of the categories.