[2.3.0] Checkmk Werk 16300 adapted: Revert werk #16150 and fix <tt>IndexError: boolean index did not match indexed array along dimension 0</tt> in forecast graphs

Werk 16300 was adapted. The following is the new Werk, a diff is shown at the end of the message. Title: Revert werk #16150 and fix <tt>IndexError: boolean index did not match indexed array along dimension 0</tt> in forecast graphs Class: fix Compatible: compat Component: metrics Date: 1700760668 Edition: cee Level: 1 Version: 2.3.0b1 This change reverts werk #16150, since this werk made forecast graphs basically unusable. Furthermore, this change fixes the error mentioned above. This error occurred when computing a forecast based on constant and incomplete input data. ------------------------------------<diff>------------------------------------------- - Title: Revert werk #16150 and fix <tt>IndexError: boolean index did not match indexed array along dimension 0<tt> in forecast graphs + Title: Revert werk #16150 and fix <tt>IndexError: boolean index did not match indexed array along dimension 0</tt> in forecast graphs ? + Class: fix Compatible: compat Component: metrics Date: 1700760668 Edition: cee Level: 1 Version: 2.3.0b1 This change reverts werk #16150, since this werk made forecast graphs basically unusable. Furthermore, this change fixes the error mentioned above. This error occurred when computing a forecast based on constant and incomplete input data.