RD lines which requires Downstream implementations

Some RD HLT2 lines require the downstream tracks for 2024 data taking. Here, as follows, a list of lines which needs down down categories, to update with the future MRs for their implementations.

Line	MR
Displaced multilepton searches (b_to_multilepton)	mentioned also in here
B \rightarrow Ks \tau l (\tau \rightarrow 3\pi) (b_to_xtaul)	-
\Lambda_b \rightarrow \Lambda \tau l (\tau \rightarrow 3\pi) (b_to_xtaul)	-
B \rightarrow Ks l l (b_to_v0ll)	!1209 (merged) , link
\Lambda_b \rightarrow \Lambda l l (b_to_v0ll)	!1209 (merged) , link
\Lambda_b \rightarrow \Lambda X l l (baryonic)	link
\Lambda_b \rightarrow Ks X l l (baryonic)	link
\Lambda_b \rightarrow \Lambda \gamma (b_to_xgamma_exclusive)	!3082 (merged)
B \rightarrow H H (H) \gamma (rad_inclusive, b_to_xgamma_conv_exclusive)	!3135 (merged)
Ks \rightarrow (X/l'l'/\pi\pi) l l (strange)
\Lambda_0 \rightarrow pl\nu_l (strange)

Feel free to update the issue! cc: @mvesteri, @poluekt, @rquaglia, @elsmith, @cagapopo, @alobosal, @htilquin, @frliu @tharris @egede