Move conda installation from deprecated DEBs to Miniconda installer #2939

Job	Run time
detect-changes	5s
test-scenarios (conda)	4m 21s
test (conda, ubuntu:jammy)	54s
test (conda, debian:11)	51s
test (conda, debian:12)	48s
test (conda, mcr.microsoft.com/devcontainers/base:debian)	1m 2s
test (conda, mcr.microsoft.com/devcontainers/base:ubuntu)	1m 0s
test (conda, ubuntu:focal)	1m 26s
test (conda, mcr.microsoft.com/devcontainers/base:noble)	57s
	11m 24s

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