Remove usages of rapids-env-update (#4090)

Reference: rapidsai/ops#2766

Replace rapids-env-update with rapids-configure-conda-channels,
rapids-configure-sccache, and rapids-date-string.

Authors:
  - Kyle Edwards (https://github.com/KyleFromNVIDIA)
  - Vyas Ramasubramani (https://github.com/vyasr)

Approvers:
  - AJ Schmidt (https://github.com/ajschmidt8)

URL: #4090

ci/build_cpp.sh

@@ -1,9 +1,13 @@
 #!/bin/bash
-# Copyright (c) 2022-2023, NVIDIA CORPORATION.
+# Copyright (c) 2022-2024, NVIDIA CORPORATION.
 
 set -euo pipefail
 
-source rapids-env-update
+rapids-configure-conda-channels
+
+source rapids-configure-sccache
+
+source rapids-date-string
 
 export CMAKE_GENERATOR=Ninja
 

ci/build_python.sh

@@ -1,9 +1,13 @@
 #!/bin/bash
-# Copyright (c) 2022-2023, NVIDIA CORPORATION.
+# Copyright (c) 2022-2024, NVIDIA CORPORATION.
 
 set -euo pipefail
 
-source rapids-env-update
+rapids-configure-conda-channels
+
+source rapids-configure-sccache
+
+source rapids-date-string
 
 export CMAKE_GENERATOR=Ninja