Add a small SLEW rate for SSRC X500 frame ESC control #2313

Job	Run time
variables	1s
fc_matrix (saluki-nxp93_default) / build	9m 1s
fc_matrix (saluki-nxp93_flat) / build	6m 38s
fc_matrix (saluki-pi_amp) / build	9m 41s
fc_matrix (saluki-pi_custom_keys, Tools/saluki-sec-scripts/custom_keys/saluki-pi/px4_bin_ed25519_... / build	10m 22s
fc_matrix (saluki-pi_default) / build	10m 2s
fc_matrix (saluki-pi_flat) / build	7m 0s
fc_matrix (saluki-v2_custom_keys, Tools/saluki-sec-scripts/custom_keys/saluki-v2/px4_bin_ed25519_... / build	10m 6s
fc_matrix (saluki-v2_amp) / build	10m 11s
fc_matrix (saluki-v2_default) / build	9m 52s
fc_matrix (saluki-v2_flat) / build	6m 57s
fc_matrix (saluki-v3_amp) / build	9m 59s
fc_matrix (saluki-v3_custom_keys, Tools/saluki-sec-scripts/custom_keys/saluki-v3/px4_bin_ed25519_... / build	9m 48s
fc_matrix (saluki-v3_default) / build	10m 4s
fc_matrix (saluki-v3_flat) / build	7m 2s
build px4fwupdater	2m 13s
upload px4fwupdater to docker registry	3m 45s
upload builds to UAE artifactory	3m 29s
upload px4fwupdater to UAE docker registry	0s
	2h 16m 11s

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