Add backward flag to PrVeloTracks

Adds a backward flag to PrVeloTracks container for backward tracks. Only one flag per container, as forward and backward containers are split.

Needed for PrKalmanFilter.

Should go with Rec!2722 (merged)

added RTA label

mentioned in merge request Rec!2722 (merged)

added 1 commit

• f594f39e - remove 'gnu::always_inline'

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mentioned in merge request Rec!2734 (merged)

resolved all threads

added 1 commit

• 173a0e19 - add method to proxy to retrieve backward flag

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approved this merge request

marked this merge request as ready

• [2022-02-23 13:43] Validation started with lhcb-master-mr#3772
• [2022-02-24 13:57] Validation started with lhcb-master-mr#3791
• [2022-02-25 09:33] Validation started with lhcb-master-mr#3801

assigned to @rmatev

changed the description

merged

mentioned in commit 85437d52

added Tracking enhancement labels

mentioned in issue Moore#397 (closed)